Warp stop motion



Feb. 20, 1934. J. J. KAUFMANN WARP STOP MOT I ON Filed March 10. 1932 6 Sheets-Sheet 1 6 Sheets-Sheet 2 J. J. KAUFMANN WARP STOP MOTION Filed March 10. 1932 ILll Feb. 20, 1934.

Feb. 20, 1934. .1. J. KAUFMANN WARP STOP MOTION Filed March 10, 1932 6 Sheets-Sheet 3 Inverzfor: qjizn, Jacolzzzfnahn, #39 @j/ J1 flarvw y.

Feb. 20, 1934. J. J. KAUFMANN WARP STOP MOTION Filed March 10. 1932 6 Sheets-Sheet 4 7%2 b WW 3 J fly. 7. R5 9. Jig/.10.

Feb. 20, 1934. J. J. KAUFMANN WARP STOP MOTION Filed March 10. 1932 6 Sheets-Sheet 5 uM vm 1 M Feb. 20, 1934. J. J KAUFMANN 1,947,992

WARP STOP MOTION Filed March 10. 1932 6 Sheets-Sheet 6 Invenfor: qjiaz cia coZfiu m Patented Feb. 20, 1934 WARP STOP MOTION John Jacob Kaufmann, Elkins Park, Pa., assignor to Steel Heddle Manufacturing Company, Philadelphia, Pa., a corporation of Pennsyl- Vania Application March 10, 1932. Serial No. 597,955

"20 Claims. (01. 139-364) My invention relates to warp stop motions for looms, that is to say, to mechanism for automatically stopping the loom in the event that one of the warp ends becomes broken or unduly slack.

My invention more particularly relates to that type of warp stop motions in which the shed forming heddles are used as part of the detector mechanism.

The principal object of my present invention is to provide a warp stop motionof the type aforesaid, which will be certain in its action, and will require a minimum of attention on the part of the operator of the loom.

A further object of my invention is to provide a warp stop motion of the type aforesaid, in which wear anddestruction of the delicate parts will be reduced to a minimum, to the end that the device will be durable and eflicient.

A further object of my invention is to provide a warp stop motion of the type aforesaid, which will not be dependent in its action upon a definite position of the harness frame at the top or bottom of its movement, so that the same will con-' tinue to function notwithstanding such slight changes as may occur from time to time in the lengths of the straps or cords which are used to raise and lower the harness frame.

With the foregoing objects in view, my invention contemplates a novel form of detector bar and co-operating heddle slots; novelmeans for imparting the movement of the heddle frame to the knock-off mechanism when the detector bar is locked against movement by reason of a defective warp end; and novel means for causing the mechanism to adjust itself automatically to such slight variations in the top and bottom positions of the harness frames as may occur from time to time in the operation of the loom.

The nature and characteristic features of my invention will bemore readily understood from the following description, taken in connection with the accompanying drawings forming part hereof, in which:

Figure 1 is a front elevation of mechanism embodying the main features of my present invention, a portion of the framework of a loom being indicated in dotted lines, and a single harness frame being shown for clarity of illustration;

Fig. 2 is a side elevation thereof, four harness frames being shown, and a portion of the lay. being shown in section;

Fig. 3 is a top or plan view of a portion of the mechanism shown in Figs. 1 and 2;

Fig. 4 is a fragmentary elevation, partly in section, illustrating a portion of the harness frame and the detector mechanism associated therewith, the parts being shown in the positions assumed when the frame is in its uppermost position, and when the loom is properly functioning with no unbroken warp ends;

Fig. 5 is a view similar to Fig. 4, but'with the parts in the positions assumed when the harness frame is in its lowermost position;

Fig. 6 is a view similar to Fig. 4, but with the parts in the positions assumed when one of the warp ends is broken and the detector mechanism is brought into operation for the purpose of bringing the loom to a stop;

Fig. 7 is a view similar to Fig. 4, showing the parts in the positions assumed shortly after the harness frame has started on its upward movement from its lowermost position.

Fig.8 is an enlarged cross sectional view of the upper portion of the harness frame, illustrating the relative arrangement of the detector bar and the upper end of the heddle, the parts being shown in the positions assumed when the harness frame is in its lowermost position, the heddle being shown raised by the tension of the warp end controlled thereby; I Fig. 9 is a view similar to Fig. 8, but with the parts shown in the positions assumed when the harness frame is in its uppermost position;

Fig. 10 is a View similar to Fig. 8, but with the parts shown in the positions assumed when the detector bar is locked against movement by one of the heddles, by reason of the warp end controlled thereby being broken or unduly slack;

Fig; 11 is a fragmentary elevation of a portion of the mechanism for actuating the detector bar; 7

Fig. 12 is a side elevation of a portion of the mechanism shown in Fig. 11;

Fig. 13 is a view similar to Fig, 11, but with the parts shown in the positions assumed when the detector bar is locked against movement by the falling of one of the heddles, by reason of the warp end controlled thereby being broken or unduly slack;

Fig. 14 is a view similar to Fig. 12, but with the parts in positions corresponding to those in Fig. 13;

Fig. 15 is a fragmentary elevation, partly in section, illustrating mechanism for actuating the detector mechanism carried by the harness frame, and for setting the knockoff mechanism to cause the same to be actuated by the lay when the detector bar is locked against movement by a fallen heddle, the parts being shown in the positions assumed when the loom is functioning normally, and the harness frame is in its uppermost position;

Fig. 16 is a view similar to Fig. 15, with the parts in the positions assumed when the loom is functioning normally but the harness frame is in its lowermost position;

Fig. 17 is a View similar to Figs. 15 and 16, but with the parts in the positions assumed when the detector bar is locked against movement;

Fig. 18 is a side elevation, enlarged, of one of the harness frames and the parts mounted thereon;

Fig. 19 is a side elevation of a portion of the mechanism shown in Figs. 15, 16 and 17;

Fig. 20 is a perspective view of a portion of the mechanism shown in Figs. 15, 16, 17, and 19, illustrating the means for detachably connecting certain of the parts and for permitting automatic adjustment of certain of the other parts, more particularly shown in Figs. 15, 16, and 17 and Fig. 21 is an enlarged cross-sectional view of the lower portion of the harness frame, illustrating the relative arrangement of the lower end of the heddle and the bar for supporting and guiding the same.

It will, of course, be understood that the drawings and description herein contained are illustrative merely, and that various changes and modifications may be made in the structure disclosed without departing from the spirit of my invention.

Referring to the drawings, each of the harness frames there shown comprises top and bottom rails 25 and 26, respectively, connected at their ends by metal struts 27 and 28. Each of the end struts shown comprises two strips of metal having their ends bent over and secured, respectively, to the inner and outer edges of the top and bottom rails at the ends thereof. It should, however, be understood that any other preferred construction of harness frame may be used if desired.

Journaled in the end struts 27 and 28 of the harness frame, preferably near the top rail 25, is a detector bar 29, which also serves as a means of support for the top ends of the heddles 30. The bottom ends of the heddles 30 are mounted on a bar 31, the ends of which are supported in the end struts 27 and 28 of the harness frame. There is also provided, adjacent the detector bar 29, an auxiliary guide bar 32, the ends of which are also supported in the end struts.

The heddles 30 are made of thin flat metal, each having a central eye 33 through which the warp 34 extends. Each heddle is also provided, at the top and bottom with elongated slots 35 and 36, respectively. The detector bar 29 and auxiliary guide bar 32 extend through the top slot 35, and the bar 31 extends through the slot 36 at the lower end of the heddle.

The slots 35 and 36 in the heddles 30 are so located with respect to the detector bar 29 and the bars 31 and 32 as to permit a limited range of vertical movement of the heddles with respect to said bars when the shedding takes place. The portion 37 at the upper end of the slot 35 of each heddle is of less width than the main portion of said slot 35.

The detector bar 29 is preferably made of a round rod having one side flatted, so that the distance from the flat side to the diametrically opposite point on said bar is substantially equal to the reduced portion 37 of the top slot 35 of the heddle.

By the foregoing arrangement, it will be noted that when the harness frame is in a raised .position, and tension is imparted to the heddles by the warp ends tending to pull the same downwardly, as the detector bar 29 is turned to the position shown in Fig. 9 of the drawings, both of the shoulders provided by the reduced portion 37 of the top slot 35 of each heddle will normally rest upon the curved surface of the detector bar.

Fixedly secured on the end of the detector bar 29 is a lever-like member 38 preferably having two arms. Each arm of the member 38 carries a projecting pin 39. The pins 39 extend into a sinuous cam slot 40 (see Figs. 12 and 14) in a slide member 41, which has a limited range of vertical movement with respect to the axis of the detector bar 29.

The slide member 41 is provided at the top and bottom ends with outwardly extending projections 42 and 43, respectively, by means of which the slide member is mounted upon a rod 44. The slide member 41 also has a certain range of vertical movement with respect to the rod 44 upon which it is mounted.

The lower end of the rod 44 is guided with respect to the harness frame by means of a lug 45, secured to the side strut 27 of the harness frame and having a slot through which the rod 44 extends. The rod 44 has a certain range of vertical movement, which will hereinafter be more fully described, both with respect to the harness frame and with respect to the main frame of the loom.

The movement of the rod 44 with respect to the harness frame is limited by means of a sleeve 46, which is mounted on the rod 44 near the lower end thereof. The sleeve 46 is adapted to engage the lug carried by the side strut 27 at one end of its movement with respect to the harness frame, and to engage 2. lug 47 also carried by the side strut 27, at the other end of its movement with respect to the harness frame.

The upper end of the rod 44 is guided by means of a bracket 48, which is carried by a portion of the side strut 27, and a small plate member 49 which cooperates with said bracket. The outer end of the bracket member 48 is slotted to permit the withdrawal of the upper end of the rod 44 when it is desired to remove the same from the frame for any purpose, said slot being open to the outer extremities of the bracket 48, and the ends of the bracket being bent over, as at 50, to retain the plate member 49 through which the rod 44 extends.

A coil spring 51, which surrounds the rod 44, is interposed between the upper end 42 of the slide member 41 and the plate member 49, this spring having the double function of holding the plate member against the bracket 48 within the bent over ends thereof, and of causing the slide member 41 to be impelled toward its lowermost position with respect to the axis of the detector bar 29, whenever the same is free from engagement with its operating latch, which will be presently described.

A bracket 52 is fixedly secured to the rod 44, and serves as a means of pivotal support fora latch 53. The lower end 54 of the latch 53 is impelled toward the outer face of the side strut 27 by means of a leaf spring 55 secured to the rod 44.

The upper end 56 of the latch 53 is adapted to engage the lower end 43 of the slide member 41, for the purpose of actuating the detector bar 29 in the manner to be hereinafter more fully described, and the lower end 54 of the latch 53 carries a lug .57 which is adapted, when the harness frame descends, to be engaged by a lug 58 carried by the side strut 27, thereby retracting the upper end 56 of the latch 53 from engagement with the lower end 43 of the slide member 41, and permitting the same to be impelled by the spring 51 to its lowermost position with respect to the axis of the detector bar 29.

The side strut 27 is also provided with a recess 59, so that a shoulder 60 is provided for engagement with the lower end 54 of the latch 53, under certain conditions and for a purpose to be presently explained.

The upper end of the rod 44 is detachably secured to a rod 61. The preferred means of attaching the rod 44 to the rod 61 is'shown in detail in the lower portion of Fig. 20 of the drawings. The upper end of the rod 44 is bent over and slotted, so as to provide lugs 62, which extend into complementary recesses 63 in the lower end of the rod 61. Likewise, the lower end of the rod 61 is bent over and slotted to provide lugs 64 which extend into complementary recesses 65 in the rod 44. A slidable sleeve 66 serves to hold the parts in their proper positions whenithe same surrounds the end portions of the rods 44 and 61, with their respective lugs 62 and 64 engaging the recesses 63 and 65, respectively, above described.

The upper end of the rod 61 is forked, so as to provide two vertically disposed arms 67 and 68. The arm 67 of the forked portion of the rod 61 is frictionally engaged by a vertical rod 69, which extends upwardly therefrom.

The means for holding the lower end of the rod 69 in engagement with the arm 67 of the forked member 61 comprises a spring clip 70, having its ends bent over. The body portion 71 of the spring clip bears against the outer surface of the rod 69, while the ends 72 of said spring clip bear against the outer. surface of the arm 67 of the forked member 61. The spring clip 70 is slotted at the bent portion thereof, for the passage therethrough of the rod 69 and the arm 67. The spring clip 70 is held in its proper position by the bent over portion 73 at the upper end of the arm 67.

The upper end of the rod 69 is enlarged as at 74, and in this enlarged portion there is provided a slot 75 through which an arm comprising a fixed horizontal bar 76 extends. The horizontal bar 76 is secured in its fixed position by means of a bracket 77 which is attached to the main frame of the loom.

The arm 68 of the forked portion of the rod 61 isalso frictionally engaged by a vertical rod 78, which extends upwardly therefrom. The means for holding the lower end of the rod '78 in engagement with the arm 68 of the forked member 61 with the proper degree of friction, similar to the means for holding the lower end-of the rod 69 in engagement with the arm'67 of said forked member 61, comprises a spring clip .79

having its ends 80 bent over. Likewise, the body portion of this spring clip 79 bears against the outer surface of the rod 78, while the ends of said spring clip bear against the outer'surface of the arm 68 of the forked member. Also, the spring clip 79 is held in its proper position by the bent over portion 81 at the upper end of the arm 68.

The upper end of the rod 78 is guided in a split clip 82, which is adjustably secured to the enlarged upper portion 74 of the rod 69. The upper end of the rod 78 is bent over to provide a finger, as at 83, which extends under a portion 84 of a rockable member 85, which is mounted..

on the fixed horizontal bar 76. The portion 84 of the rockable member 85 which is adapted to be engaged by the finger 83 of each rod 78 extends parallel to the fixed horizontal bar 76, a sufiicient distance to allow the same to be selectively operated by any one of the fingers 83 of the rods 78, which are respectively connected to the individual harness frames in the manner hereinbefore described.

The rockable member 85 carries an extending arm 86, the end of which is slotted, as at 87, for the passage therethrough of a rod or wire 88, upon which is adjustably mounted a collar 89 which is engaged by the outer slotted end of the arm 86 of the rockable member 85, the arrangement being such that when the rockable member is actuated, the rod or wire 88 may be raised.

The lower end of the rod or wire 88 is connected to one end of a bar 90. The other end of the bar 90 is adjustably mounted in a bracket 91, which is pivotally connected by means of a bolt 92 to one arm 93 of a bell crank lever, which is pivotally mounted by means of a shaft 94. The other arm 95 of the bell crank lever is adapted to engage and knock off the shipper lever 96 of the loom whenever the bar 90 is actuated.

For the purpose of actuating the bar 90 when the same is raised by means of the rod or wire 88, the same has adjustably mounted thereon a bracket 97, having an upwardly extending angular lug 98. The lay 99 is also provided with a bracket member 100, having a lug 101 adapted to encounter the lug 98 whenever the bar 90 is raised by means of the rod or wire 88.

The operation of the mechanism above described may now be explained. The harness frames are raised and lowered in the customary manner by means of any preferred type of shedding mechanism. In Fig. 1 of the drawings, the

particular harness frame is there shown in the elevated position, and the parts associated therewith are in their respective positions correspond ing to the elevated position of the frame.

Assuming that all of the warp ends 34 con- 3 trolled by a particular harness frame are unbroken and properly tensioned, the detector bar 29 will be'in the position shown in Fig. 9, and the heddles36 will be supported at their upper ends by means of the shoulders, provided at the nar- 3'."

row portion 37 of the slot 35, resting upon the curved surface of the bar 29. That portion of the mechanism which is immediately connected to the harness frame will, when the harness frame is in its uppermost position, be in the position 1' tical rod 44 which is slidably mounted upon the I side strut 27 of the harness frame.

The upper end 56 of the latch 53 will be engaged by the lower end 43 of the slide member 41. The pins 39 carried by the two-armed member 38 which is carried on the end of the detector bar 29, will now be caused to pass through the cam slot 40 in the slide member 41, thereby giving the detector bar 29 an angular movement about its longitudinal axis.

At this. stage of the operation, the tension 'imparted to the heddles 30 by the warp ends 34 will be reversed, and normally all of the heddles will be raised, with the narrow portions 37 of the slots out of engagement with the detector bar 29, thus permitting the free angular oscillation of the bar.

Assuming that none of the heddles has dropped, to lock the detector bar 29 against returning to its initial position, as the harness frame continues in its downward movement, the lug 58 which is carried by the side strut 2'7 of the frame will encounter the lug 57 which is carried by the latch 53, retracting the upper end 56 of the latch 53 from engagement with the lower end 43 of the slide member 41, and permitting the slide member 41 to be impelled by means of the spring 51 to its lowermost position with respect to the axis of the detector bar 29, and thereby through the engagement of, the pins 39 with the cam slot 40 in the slide member 41, the detector bar 29 will be returned to its initial position.

It will be noted that when the lower end 43 of the slide member 41 is thus released from engagement with the upper end 56 of the latch 53, the upper end of the latch will lie between the slide member 41 and the side strut 27 of the frame (see Fig. 5), and when the harness frame starts on its upward movement, the latch 53 will be held in this position by the slide member 41 until the lower end 54 of said latch clears the shoulder provided at the lower end of the recess 59in the side strut 27 of the frame (see Fig. '7).

If, however, one of the warp ends 34 should be broken or become unduly slack, the heddle 30 for controlling the same will drop, and will lock the detector bar 29 against return to its initial position (see Fig. 10), and when the detector bar is thus locked, the slide member 41 will not be permitted to return to its initial position, as by reason of the detector bar 29 being locked, the pins 39 which engage the cam slot 40 in the slide member 41 will restrain the slide member 41 against return movement (see Figs. 6,13, and 14), and when the frame starts on its upward movement, the latch 53 will be released in advance of its normal time, permitting the lower end 54 thereof to engage the shoulder 60 which is provided at the lower end of the recess 59 in the side strut 2'7 of the harness frame, whereupon, through the intermediary of said latch 53, and under the push imparted by the frame, the rod 44 will be carried upwardly with the harness frame, and this motion will be imparted to the rod 61, and through the rod 61 to the rods 69 and '78 by reason of the frictional engagement therewith provided by the tension of the spring clips 70 and 79, respectively. As the movement of the rods 69 and '78 continues, the split clip 82, which is secured to the enlarged slotted end of the rod 69, will encounter the under side of the fixed horizontal bar '76, whereupon further movement of the rod 69 will be prevented, and the arm 67 of the forked end of the rod 61 will slide over the rod 69 as the frame continues to its uppermost position.

However, as the upper end of the rod 78 is slidably mounted in the split clip 82, the same will continue upwardly as the harness frame approaches the end of its movement, whereupon the finger 83 of said rod 78 will cause the rockable member 85 to be actuated through its engagement with the portion 84 thereof. When the rockable member 85 is thus actuated by the finger 83 of the rod '78, the wire or rod 88 will be lifted, thereby raising the bar 90, and causing the lug 98 of the bracket 97,,which is carried thereby, to be encountered by the lug 101 of the bracket 100 which is carried by the lay 99. As the lay continues in its movement, the bar 90 will be shifted, and will, through the intermediary of the bracket 91, cause the arm 95 of the bell crank lever to knock off the shipper bar 96, thus bringing the loom to a stop.

After the operator has tied up or properly tensioned the defective warp end 34, the rod 69 will be automatically reset to its proper position as the harness frame descends to its lowermost position, the frictional engagement of the arm 67 of the forked member 61 permitting the same to be shifted when the movement of the rod 69 is arrested by the upper end of the slot engaging the top of the fixed horizontal bar 76.

It may here be noted that when the distance between the end of the slot 75, in the enlarged portion 74 of the rod 69, and the adjustable clip 82 is properly adjusted, the device will thereafter automatically adjust itself to any slight differences which may occur in the limit positions of the harness frame by reason of variations in the lengths of the straps or cords which are used to raise and lower the harness frame.

I claim:

1. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; detector mechanism in the frame controlled by the heddles; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto and also a limited range of movement with respect to the loom frame; a latch controlled by the detector mechanism adapted to effect a direct connection of the harness frame to the rod thereby to impart movement to the rod in addition to its normal movement; and means controlled by said rod for stopping the loom.

2. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; detector mechanism in the frame controlled by the heddles; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto and also a limited range of movement with respect to the loom frame; means controlled by the detector mechanism but otherwise independent thereof for connecting the harness frame to the rod thereby to impart movement to the rod in addition to its normal movement; means controlled by said rod for stopping the loom; and automatically adjustable means for limiting the movement of the rod with respect to the loom frame.

3. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; detector mechanism in the frame controlled by the heddles; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto and also having a limited range of movement with respect to the loom frame; means controlled by the detector mechanism but otherwise independent thereof for connecting the harness frame to the rod thereby to impart movement to the rod in addition to its normal movement; a member in frictional engagement with said'rod and normally movable therewith; means controlled by said member for stopping the loom; and automatically adjustable means for limiting the movement of the rod with respect to the loom frame.

4. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein;

. detector mechanism in the frame controlled by the heddles; a rod mounted at the end of the harness frame having a limited range of movement with respect theretoand' also a limited range of movement with respect to the loom frame; means controlled by the detector mechanismrbut otherwise independent thereof for connecting the harness frame to the rod thereby to impart movement to the rod in addition to its normal movement; a member in frictional engagement with said rod and normally movable therewith; means controlled by said member for stopping the loom; and automatically adjustable means for limiting the movement of the rod with respect to the loom frame, said means comprising a member in frictional engagement with the rod and normally movable therewith, and anarm fixedly secured with respect to the loom frame, said member and said arm being in slotted engagement with each other.

5. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; detector mechanism in the frame controlled by the heddles; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto and also a limited range of movement with respect to the loom frame; means controlled by the detector mechanism but otherwise independent thereof for connecting the harness frame to the rod thereby to impart movement to the rod in addition to its normal movement; a member in frictional engagement with said rod and normally movable therewith; a finger carried by said member; a rockable member adapted to be engaged by said finger; means connected to said rockable member for stopping the loom; and automatically adjustable means for limiting the movement of the rod with respect to the loom frame.

6. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; detector mechanism in the frame controlled by the heddles; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto and also a limited range of movement with respect to the loom frame; means controlled by the detector mechanism but otherwise independent thereof for connecting the harness frame to the rod thereby to impart movement to the rod in addition ,to its normal movement; a member in frictional engagement with said rod and normally movable therewith; a finger carried by said member; a rockable member adapted to be engaged by said finger; means connected to said rockable member for stopping the loom; and automatically adjustable means for limiting the movement of the rod with respect to the loom frame, said means comprising a member in frictional engagement with the rod and normally movable therewith, and an arm fixedly secured with respect to the loom frame, said member and said arm being in slotted engagement with each other.

I. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddle; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; means controlled by the detector bar but otherwise independent thereof for connecting theharness frame to the rod thereby to impart movementto the rod in addition to its normal movement; and means controlled by the 'rod for stopping the loom.

frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame; each of the heddles having a slot through which the detector bar. extends; the detector bar being non-circular in cross-section; the slot in each heddle having a narrow portion whereby the movement of the detector bar may be arrested by a dropped heddle; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch controlled by the detector bar adapted to effect a direct connection of the harness frame to the rod thereby to impart movement to the rod in addition to its normal movement; and means controlled by the rod for stopping the loom.

9. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member having a cam slot; off-center pins carried at the end of the detector bar engaging the cam slot in the slide member whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; means controlled by the slide member for imparting movement to the rod in addition to its normal movement; and {neans controlled by the rod for stopping the oom.

10. In a Warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness'frame; each of the heddles having a slot through which the detector bar extends; the detector bar, having a single fiat side but being otherwise circular in cross-section; the slot in each heddle having a narrow portion whereby the movement of the detector bar may be arrested by a droppedheddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch controlled by the slide member adapted to efiect a direct connection of theharness frame to the rod thereby to impart movement to the rod in addition to its normal movement; and means controlled by the rod for stopping the loom;

11. In a warp stop motion for looms, a harness frame; shed forming heddles mounted'therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddlera slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the endof the harness frame having a limited range of movement with respect thereto; a latch carried by said rod; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder'to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide member is restrained against complete movement; and means controlled by the rod for stopping the loom.

12. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame; each of the heddles having a slot through which the detector bar extends; the detector bar having a single flat side but being otherwise circular in cross section; the slot in each heddle having a narrow portion whereby the movement of the detector bar may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion enaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the, latch being permitted such engagementwhen the slide member is restrained against complete movement; and means controlled by the rod for stopping the loom.

13. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; and means controlled by the rod for stopping the loom.

14. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame; each of the heddles having a slot through which the detector bar extends; the detector bar having a single flat side but being otherwise circular in cross-section; the slot in each heddle having a narrow portion whereby the movement of the detector bar may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited rangeof movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; and means controlled by the rod for stopping the loom.

15. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; ashoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide member is restrained against complete movement; and means controlled by the rod for stopping the loom.

16. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar -mounted in the harness frame; each of the heddles having a slot through which the detector bar extends; the detector bar having a single flat side but being otherwise circular in cross-section; the slot in each heddle having a narrow portion whereby the movement of the detector bar may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the barness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide member is restrained against complete movement; and means controlled by the rod for stopping the loom.

1'7. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; means for tripping the, latch thereby to release the slide member at an intermediate point in the movement of the rod with respect to the harness frame; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide meme ber is restrained against complete movement; and means controlled by the rod for stopping the loom.

18. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame; each of the heddles having a slot through which the detector bar extends; the detector bar having a single flat side but being otherwise circular in cross-section; the slot in each heddle having a narrow portion whereby the movement of the detector bar may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member being operatively connected to the detector bar whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; means for tripping the latch thereby torelease the slide member at an intermediate point in the movement of the rod with respect to the harness frame; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide member is restrained against complete movement; and. means controlled by the rod for stopping the a loom.

19. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame, the movement of which may be arrested by a dropped heddle; a slide member mounted at one end of the harness frame, said slide member having a cam slot; off-center pins carried at the end of the detector bar en aging the cam slot in the slide member whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; coacting lugs carried respectively by the frame and the latch adapted to trip the latch and thereby release the slide member at an intermediate point in the movement of the rod with respect to the harness frame; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion ofthe latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide member is restrained against complete movement; and means controlled by the rod for stopping the loom.

20. In a warp stop motion for looms, a harness frame; shed forming heddles mounted therein; a detector bar mounted in the harness frame; each of the heddles having a slot through which the detector bar extends; the detector bar having a single flat side but being otherwise circular in cross-section; the slot in each heddle having a narrow portion whereby the movement of the detector bay may be arrested by a dropped heddle; aslide member mounted at one end of the harness frame, said slide member having a cam slot; off-center pins carried at the end of the detector bar engaging the cam slot in the slide member whereby the detecting movement of the detector bar will be imparted thereto by the movement of the slide member and whereby the slide member will be restrained against complete movement when the movement of the detector bar is arrested; a rod mounted at the end of the harness frame having a limited range of movement with respect thereto; a latch carried by said rod adapted to engage the slide member to actuate the same; coacting lugs carried respectively by the frame and the latch adapted to trip the latch and thereby release the slide member at an intermediate point in the movement of the rod with respect to the harness frame; a shoulder carried by the frame; a portion of the latch being adapted to engage said shoulder to impart movement to the rod in addition to its normal movement; the slide member having a portion engaged by a portion of the latch to restrain the latch during normal operation from engagement with said shoulder, the latch being permitted such engagement when the slide member is restrained against complete movement; and means controlled by the rod for stopping the loom.

JOHN JACOB KAUFMANN. 

